HW_solu_09-13-04

# HW_solu_09-13-04 - TAM 210 / 211, Fall, 2004 Homework...

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TAM 210 / 211, Fall, 2004 Homework solutions for 09/13 3.77 Given: Truss members carrying the indicated forces Find: Resultant of the four forces at P Solution: ( ) ( ) ( ) i j i j i i F F ˆ 1200 ˆ 30 sin ˆ 30 cos 100 ˆ 45 sin ˆ 45 cos 800 ˆ 500 lb lb lb lb forces r r + + + + = = v v ( ) ( ) ( ) ( ) () ( ) [ ] lb r j i F ˆ 2 / 1 100 2 2 800 ˆ 1200 2 3 100 2 2 800 500 + + + + + = v ( ) lb r j i F ˆ 66 ˆ 2130 = v 3.83 Given: The applied forces and couples at point P Find: Force and couple resultant at O Solution: k j i F F ˆ 30 ˆ 20 ˆ 40 lb lb lb forces r r = = v v = = + × = = couples forces i N i i N i i OA couples forces O O r 1 1 , , C F r M M v v v v v ( ) ()()() k j i k j i i M ˆ 20 ˆ 30 ˆ 40 ˆ 30 ˆ 20 ˆ 40 ˆ 5 , ft lb ft lb ft lb lb lb lb ft O r + × = v ( ) () ()()() k j i j k M ˆ 20 ˆ 30 ˆ 40 ˆ 150 ˆ 100 , ft lb ft lb ft lb ft lb O r +
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## This homework help was uploaded on 04/07/2008 for the course TAM 211 taught by Professor Downing during the Fall '05 term at University of Illinois at Urbana–Champaign.

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